diff options
Diffstat (limited to 'ubi-utils/src')
| -rw-r--r-- | ubi-utils/src/ubiupdate.c | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/ubi-utils/src/ubiupdate.c b/ubi-utils/src/ubiupdate.c new file mode 100644 index 0000000..4133194 --- /dev/null +++ b/ubi-utils/src/ubiupdate.c @@ -0,0 +1,305 @@ +/* + * Copyright (c) International Business Machines Corp., 2006 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* + * An utility to update UBI volumes. + * + * Authors: Frank Haverkamp + * Joshua W. Boyer + * Artem Bityutskiy + */ + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdint.h> +#include <getopt.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/stat.h> + +#include <libubi.h> +#include "common.h" + +#define PROGRAM_VERSION "1.3" +#define PROGRAM_NAME "ubiupdate" + +struct args { + int truncate; + const char *node; + const char *img; +}; + +static struct args myargs = { + .truncate = 0, + .img = NULL, +}; + +static const char *doc = "Version " PROGRAM_VERSION "\n" + PROGRAM_NAME " - a tool to write data to UBI volumes."; + +static const char *optionsstr = +"-n, --vol_id=<volume id> ID of UBI volume to update\n" +"-t, --truncate truncate volume (wipe it out)\n" +"-h, --help print help message\n" +"-V, --version print program version"; + +static const char *usage = +"Usage: " PROGRAM_NAME " <UBI volume node file name> [-t] [-h] [-V] [--truncate] [--help]\n" +"\t\t[--version] <image file>\n\n" +"Example 1: " PROGRAM_NAME " /dev/ubi0_1 fs.img - write file \"fs.img\" to UBI volume /dev/ubi0_1\n" +"Example 2: " PROGRAM_NAME " /dev/ubi0_1 -t - wipe out UBI volume /dev/ubi0_1"; + +struct option long_options[] = { + { .name = "truncate", .has_arg = 0, .flag = NULL, .val = 't' }, + { .name = "help", .has_arg = 0, .flag = NULL, .val = 'h' }, + { .name = "version", .has_arg = 0, .flag = NULL, .val = 'V' }, + { NULL, 0, NULL, 0} +}; + +static int parse_opt(int argc, char * const argv[], struct args *args) +{ + while (1) { + int key; + + key = getopt_long(argc, argv, "n:thV", long_options, NULL); + if (key == -1) + break; + + switch (key) { + case 't': + args->truncate = 1; + break; + + case 'h': + fprintf(stderr, "%s\n\n", doc); + fprintf(stderr, "%s\n\n", usage); + fprintf(stderr, "%s\n", optionsstr); + exit(0); + + case 'V': + fprintf(stderr, "%s\n", PROGRAM_VERSION); + exit(0); + + case ':': + errmsg("parameter is missing"); + return -1; + + default: + fprintf(stderr, "Use -h for help\n"); + exit(-1); + } + } + + return 0; +} + +static int truncate_volume(libubi_t libubi) +{ + int err, fd; + + fd = open(myargs.node, O_RDWR); + if (fd == -1) { + errmsg("cannot open \"%s\"", myargs.node); + perror("open"); + return -1; + } + + err = ubi_update_start(libubi, fd, 0); + if (err) { + errmsg("cannot truncate volume \"%s\"", myargs.node); + perror("ubi_update_start"); + close(fd); + return -1; + } + + close(fd); + return 0; +} + +static int ubi_write(int fd, const void *buf, int len) +{ + int ret; + + while (len) { + ret = write(fd, buf, len); + if (ret < 0) { + if (errno == EINTR) { + warnmsg("do not interrupt me!"); + continue; + } + errmsg("cannot write %d bytes to volume \"%s\"", + len, myargs.node); + perror("write"); + return -1; + } + + if (ret == 0) { + errmsg("cannot write %d bytes to volume \"%s\"", + len, myargs.node); + return -1; + } + + len -= ret; + buf += ret; + } + + return 0; +} + +static int update_volume(libubi_t libubi, struct ubi_vol_info *vol_info) +{ + int err, fd, ifd; + long long bytes; + struct stat st; + char *buf; + + buf = malloc(vol_info->eb_size); + if (!buf) { + errmsg("cannot allocate %d bytes of memory", vol_info->eb_size); + return -1; + } + + err = stat(myargs.img, &st); + if (err < 0) { + errmsg("stat failed on \"%s\"", myargs.node); + goto out_free; + } + + bytes = st.st_size; + if (bytes > vol_info->rsvd_bytes) { + errmsg("\"%s\" (size %lld) will not fit volume \"%s\" (size %lld)", + myargs.img, bytes, myargs.node, vol_info->rsvd_bytes); + goto out_free; + } + + fd = open(myargs.node, O_RDWR); + if (fd == -1) { + errmsg("cannot open UBI volume \"%s\"", myargs.node); + perror("open"); + goto out_free; + } + + ifd = open(myargs.img, O_RDONLY); + if (ifd == -1) { + errmsg("cannot open \"%s\"", myargs.img); + perror("open"); + goto out_close1; + } + + err = ubi_update_start(libubi, fd, bytes); + if (err) { + errmsg("cannot start volume \"%s\" update", myargs.node); + perror("ubi_update_start"); + goto out_close; + } + + while (bytes) { + int tocopy = vol_info->eb_size; + + if (tocopy > bytes) + tocopy = bytes; + + err = read(ifd, buf, tocopy); + if (err != tocopy) { + if (errno == EINTR) { + warnmsg("do not interrupt me!"); + continue; + } else { + errmsg("cannot read %d bytes from \"%s\"", + tocopy, myargs.img); + perror("read"); + goto out_close; + } + } + + err = ubi_write(fd, buf, tocopy); + if (err) + goto out_close; + bytes -= tocopy; + } + + close(ifd); + close(fd); + free(buf); + return 0; + +out_close: + close(ifd); +out_close1: + close(fd); +out_free: + free(buf); + return -1; +} + +int main(int argc, char * const argv[]) +{ + int err; + libubi_t libubi; + struct ubi_vol_info vol_info; + + if (argc < 2 || argv[1][0] == '-') { + errmsg("UBI device name was not specified (use -h for help)"); + return -1; + } + + if (argc < 3) { + errmsg("too few arguments (use -h for help)"); + return -1; + } + + myargs.img = argv[argc - 1]; + myargs.node = argv[1]; + + parse_opt(argc, argv, &myargs); + + if (!myargs.img && !myargs.truncate) { + errmsg("incorrect arguments, use -h for help"); + } + + libubi = libubi_open(); + if (libubi == NULL) { + perror("Cannot open libubi"); + goto out_libubi; + } + + err = ubi_get_vol_info(libubi, myargs.node, &vol_info); + if (err) { + errmsg("cannot get information about UBI volume \"%s\"", + myargs.node); + perror("ubi_get_dev_info"); + goto out_libubi; + } + + if (myargs.truncate) + err = truncate_volume(libubi); + else + err = update_volume(libubi, &vol_info); + if (err) + goto out_libubi; + + libubi_close(libubi); + return 0; + +out_libubi: + libubi_close(libubi); + return -1; +} |